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Chapter 3 vocab

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Term
Definition
Adaptation   sum of the changes an animal makes in response to environmental stimuli  
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Symbiotic relationship   organisms live together in a mutually beneficial relationship  
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Stress   a state of physical, emotional, or chemical strain or tension on the body  
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Pathogen   any living disease-producing agent  
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Toxin   one of several poisonous compounds produced by some microorganisms, plants, and animals  
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Parasite   an organism that lives at the expense of a organism; generally must live on or in the host  
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Transhumance   the practice of moving animals seasonally from a permanent base to more abundant feed and water and then returning to the permanent base as season changes  
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Nomadism   practice of people without a permanent home base moving from place to place  
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Grade up   in animal species, the process of improving a stock of animals for some productive function by consecutive matings with animals considered genetically superior  
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Desertification   degradation or destruction of the biological potential of land, leading to desert-like conditions  
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Animal rights movement   political and social movement that concerns itself with philosophy, sociology, and public policy as each deals with the standing of animals in relation to human society  
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Kosher   food is considered ritually fit for use as sanctioned by Jewish religious law  
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Taboo   prohibition imposed by social custom against some action or object  
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Market economy   economies in which prices are freely determined by the laws of supply and demand  
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Centrally planned economy   an economy under government control; prices, labor, and other economic inputs are controlled and not allowed to fluctuate in accordance with supply and demand  
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Transition economy   an economy once centrally planned that is changing to a market economy  
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Literacy   the ability to read and write  
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